1361264977 has 2 divisors, whose sum is σ = 1361264978. Its totient is φ = 1361264976.

The previous prime is 1361264939. The next prime is 1361265001. The reversal of 1361264977 is 7794621631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783776016 + 577488961 = 27996^2 + 24031^2 .

It is an emirp because it is prime and its reverse (7794621631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361264977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361264677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680632488 + 680632489.

It is an arithmetic number, because the mean of its divisors is an integer number (680632489).

Almost surely, 2^1361264977 is an apocalyptic number.

It is an amenable number.

1361264977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361264977 is an equidigital number, since it uses as much as digits as its factorization.

1361264977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 1361264977 is about 36895.3245954010. The cubic root of 1361264977 is about 1108.2750517805.

The spelling of 1361264977 in words is "one billion, three hundred sixty-one million, two hundred sixty-four thousand, nine hundred seventy-seven".